/* ============ 中二電腦科 · 任務控制中心 Portal ============ */
:root{
  --bg:#0a0e1a; --bg2:#0d1226;
  --cyan:#00f0ff; --magenta:#ff2fd6; --purple:#8b5cf6;
  --mint:#00ffa3; --blue:#4d7cff; --amber:#ffb020;
  --ink:#eaf2ff; --dim:#93a0c4;
  --glass:linear-gradient(160deg, rgba(255,255,255,.07), rgba(255,255,255,.02));
  --stroke:rgba(255,255,255,.1);
}
*{box-sizing:border-box; margin:0; padding:0;}
html{font-size:16px; scroll-behavior:smooth;}
body{
  font-family:"Noto Sans TC","Microsoft JhengHei","PingFang TC",sans-serif;
  background:var(--bg); color:var(--ink); overflow-x:hidden; min-height:100vh;
}
/* 星雲底色 + 透視網格 */
body::before{
  content:""; position:fixed; inset:0; z-index:-4;
  background:
    radial-gradient(900px 500px at 15% -5%, rgba(0,240,255,.14), transparent 60%),
    radial-gradient(900px 600px at 85% 10%, rgba(255,47,214,.12), transparent 60%),
    radial-gradient(1000px 700px at 50% 110%, rgba(139,92,246,.14), transparent 60%),
    var(--bg);
}
.grid-floor{
  position:fixed; inset:0; z-index:-3; pointer-events:none; opacity:.5;
  background:
    linear-gradient(rgba(0,240,255,.05) 1px, transparent 1px) 0 0/100% 44px,
    linear-gradient(90deg, rgba(0,240,255,.05) 1px, transparent 1px) 0 0/44px 100%;
  mask-image:radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 90% 70% at 50% 30%, #000 30%, transparent 75%);
  animation:gridPan 24s linear infinite;
}
@keyframes gridPan{to{background-position:0 44px, 44px 0;}}
#fxCanvas{position:fixed; inset:0; z-index:-2; pointer-events:none;}
.scanlines{
  position:fixed; inset:0; z-index:-1; pointer-events:none; opacity:.05;
  background:repeating-linear-gradient(0deg, #fff 0 1px, transparent 1px 4px);
}
button{font-family:inherit; cursor:pointer;}
a{color:inherit;}
h1,h2,h3{line-height:1.25;}
.mono{font-family:"Orbitron","Consolas",monospace;}

/* ============ localhost 提示 bar（只喺 file:// 顯示） ============ */
#protoBar{
  display:none; background:rgba(255,176,32,.12); color:var(--amber); text-align:center;
  font-weight:700; font-size:.9rem; padding:9px 14px; letter-spacing:.5px;
  border-bottom:1px solid rgba(255,176,32,.4); backdrop-filter:blur(8px);
}
#protoBar.show{display:block; animation:fadeUp .5s both;}
#protoBar code{background:rgba(255,176,32,.2); border:1px solid rgba(255,176,32,.5); padding:1px 8px; border-radius:6px; margin:0 4px;}

/* ============ Hero ============ */
#hero{
  min-height:92vh; display:flex; flex-direction:column; align-items:center;
  justify-content:center; text-align:center; padding:60px 20px 46px; gap:24px;
  position:relative;
}
.hero-tag{
  display:inline-flex; align-items:center; gap:10px; color:var(--cyan);
  padding:7px 22px; border-radius:999px; font-weight:700; letter-spacing:3px; font-size:.85rem;
  border:1px solid rgba(0,240,255,.4); background:rgba(0,240,255,.07);
  box-shadow:0 0 24px rgba(0,240,255,.18), inset 0 0 18px rgba(0,240,255,.06);
  animation:fadeUp .6s .1s both;
}
.hero-tag::before{content:""; width:8px; height:8px; border-radius:50%; background:var(--cyan);
  box-shadow:0 0 10px var(--cyan); animation:blink 1.6s infinite;}
@keyframes blink{50%{opacity:.25;}}
.hero-title{
  font-size:clamp(2.3rem, 6.4vw, 4.4rem); font-weight:900; letter-spacing:4px;
}
.hero-title .ch{
  display:inline-block; opacity:0; transform:translateY(54px) scale(.35);
  animation:chIn .65s cubic-bezier(.2,.9,.3,1.35) forwards;
  background:linear-gradient(120deg, var(--cyan), var(--purple) 52%, var(--magenta));
  -webkit-background-clip:text; background-clip:text; color:transparent;
  filter:drop-shadow(0 0 22px rgba(0,240,255,.3));
}
@keyframes chIn{to{opacity:1; transform:none;}}
.hero-sub{
  font-size:clamp(1.02rem, 2.2vw, 1.32rem); font-weight:700; max-width:680px; color:var(--dim);
  animation:fadeUp .7s 1.2s both;
}
.hero-sub b{color:var(--ink);}
.hero-stats{display:flex; gap:16px; flex-wrap:wrap; justify-content:center; animation:fadeUp .7s 1.5s both;}
.stat-chip{
  background:var(--glass); border:1px solid var(--stroke); border-radius:16px;
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  padding:12px 24px; font-weight:700; font-size:.92rem; color:var(--dim);
  box-shadow:0 14px 34px rgba(0,0,0,.4); transition:transform .2s, border-color .2s;
}
.stat-chip:hover{transform:translateY(-4px); border-color:rgba(0,240,255,.5);}
.stat-chip b{
  display:block; font-size:1.5rem; font-family:"Orbitron","Consolas",monospace;
  background:linear-gradient(120deg,var(--cyan),var(--magenta));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.hero-orb-row{display:flex; gap:16px; animation:fadeUp .6s .4s both;}
.hero-orb{
  width:72px; height:72px; border-radius:50%; display:flex; align-items:center; justify-content:center;
  font-size:2rem; background:var(--glass); border:1px solid var(--stroke);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  box-shadow:0 0 26px rgba(139,92,246,.22), inset 0 0 20px rgba(0,240,255,.07);
  animation:hover 3.2s ease-in-out infinite;
}
.hero-orb:nth-child(2){animation-delay:.5s; box-shadow:0 0 26px rgba(0,240,255,.25);}
.hero-orb:nth-child(3){animation-delay:1s; box-shadow:0 0 26px rgba(255,47,214,.25);}
.hero-orb:nth-child(4){animation-delay:1.5s; box-shadow:0 0 26px rgba(255,176,32,.25);}
.hero-orb:nth-child(5){animation-delay:2s; box-shadow:0 0 26px rgba(0,255,163,.25);}
@keyframes hover{0%,100%{transform:translateY(0);}50%{transform:translateY(-12px);}}
@keyframes fadeUp{from{opacity:0; transform:translateY(28px);}to{opacity:1; transform:none;}}
.scroll-hint{
  position:absolute; bottom:20px; left:50%; transform:translateX(-50%);
  font-weight:700; font-size:.85rem; letter-spacing:3px; color:var(--dim);
  animation:hover 2s infinite;
}

/* ============ 頂部工具列（搜尋＋語言） ============ */
#toolbar{
  position:sticky; top:0; z-index:100; padding:12px 18px;
  display:flex; gap:14px; align-items:center; flex-wrap:wrap; justify-content:center;
  background:rgba(10,14,26,.78); backdrop-filter:blur(16px); -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--stroke);
}
#searchBox{
  flex:1 1 300px; max-width:480px; display:flex; align-items:center; gap:10px;
  background:rgba(255,255,255,.05); border:1px solid var(--stroke); border-radius:999px;
  padding:9px 20px; transition:border-color .2s, box-shadow .2s;
}
#searchBox:focus-within{border-color:var(--cyan); box-shadow:0 0 22px rgba(0,240,255,.25);}
#searchInput{border:none; outline:none; flex:1; font-size:1.02rem; font-weight:700; background:transparent; color:var(--ink); min-width:0;}
#searchInput::placeholder{color:var(--dim);}
#langToggle{
  display:flex; border:1px solid var(--stroke); border-radius:999px; overflow:hidden;
  background:rgba(255,255,255,.05); font-weight:900;
}
#langToggle button{
  border:none; background:transparent; color:var(--dim); padding:8px 18px;
  font-weight:900; font-size:.95rem; transition:all .2s;
}
#langToggle button.on{
  background:linear-gradient(120deg, rgba(0,240,255,.25), rgba(255,47,214,.25)); color:#fff;
  text-shadow:0 0 12px rgba(0,240,255,.8);
}

/* ============ 階段導航 ============ */
#stageNav{
  display:flex; gap:12px; flex-wrap:wrap; justify-content:center;
  padding:30px 18px 8px; max-width:1240px; margin:0 auto;
}
.stage-pill{
  border:1px solid var(--stroke); border-radius:999px; background:var(--glass);
  backdrop-filter:blur(12px); -webkit-backdrop-filter:blur(12px);
  color:var(--ink); padding:10px 20px; font-weight:700; font-size:.98rem;
  display:flex; align-items:center; gap:10px; transition:all .2s;
}
.stage-pill:hover{transform:translateY(-3px); border-color:var(--c); box-shadow:0 0 22px var(--g);}
.stage-pill .dot{width:11px; height:11px; border-radius:50%; background:var(--c); box-shadow:0 0 10px var(--c);}
.stage-pill small{font-size:.72rem; color:var(--dim); font-family:"Orbitron","Consolas",monospace;}

/* ============ 階段區塊 + 卡片牆 ============ */
main{max-width:1280px; margin:0 auto; padding:10px 24px 90px;}
.stage-section{padding-top:40px; scroll-margin-top:84px;}
.stage-head{display:flex; align-items:center; gap:16px; flex-wrap:wrap; margin-bottom:8px;}
.stage-head .band{
  width:54px; height:54px; border-radius:16px; flex:0 0 auto;
  display:flex; align-items:center; justify-content:center;
  font-family:"Orbitron","Consolas",monospace; font-weight:900; font-size:1.3rem; color:var(--c);
  border:1px solid var(--c); background:var(--g); box-shadow:0 0 22px var(--g), inset 0 0 16px var(--g);
}
.stage-head h2{
  font-size:1.75rem; font-weight:900;
  background:linear-gradient(120deg, #fff, var(--c)); -webkit-background-clip:text; background-clip:text; color:transparent;
}
.stage-head .range{
  border:1px solid var(--stroke); color:var(--dim); border-radius:999px; padding:4px 15px;
  font-family:"Orbitron","Consolas",monospace; font-size:.8rem; letter-spacing:1px;
}
.stage-desc{font-weight:700; margin:0 0 20px 70px; color:var(--dim);}
.card-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(258px,1fr)); gap:20px;}
.lesson-card{
  display:block; text-decoration:none; position:relative; border-radius:20px; overflow:hidden;
  background:var(--glass); border:1px solid var(--stroke);
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  box-shadow:0 16px 40px rgba(0,0,0,.45);
  transition:transform .22s cubic-bezier(.2,.9,.3,1.3), box-shadow .22s, border-color .22s;
  opacity:1; transform:none;
}
.lesson-card.reveal-pending{opacity:0; transform:translateY(42px) scale(.95);}
.lesson-card.reveal-pending.in{animation:cardIn .6s cubic-bezier(.2,.9,.3,1.25) forwards; animation-delay:var(--d,0s);}
@keyframes cardIn{to{opacity:1; transform:none;}}
.lesson-card:hover{
  transform:translateY(-8px); border-color:var(--stage);
  box-shadow:0 24px 54px rgba(0,0,0,.55), 0 0 30px var(--stage-glow);
}
.card-band{height:3px; background:linear-gradient(90deg, transparent, var(--stage), transparent); box-shadow:0 0 14px var(--stage);}
.card-body{padding:18px 20px 20px;}
.card-top{display:flex; align-items:center; gap:13px; margin-bottom:10px;}
.card-emoji{
  width:56px; height:56px; border-radius:16px; flex:0 0 auto;
  display:flex; align-items:center; justify-content:center; font-size:1.9rem;
  background:rgba(255,255,255,.06); border:1px solid var(--stroke);
  box-shadow:inset 0 0 16px var(--stage-glow); transition:transform .22s;
}
.lesson-card:hover .card-emoji{transform:scale(1.12) rotate(-6deg);}
.card-badge{
  color:var(--stage); border:1px solid var(--stage); border-radius:8px; padding:3px 11px;
  font-family:"Orbitron","Consolas",monospace; font-weight:700; font-size:.78rem; letter-spacing:2px;
  text-shadow:0 0 10px var(--stage-glow); background:var(--stage-glow);
}
.card-title{font-size:1.14rem; font-weight:900; margin:2px 0 7px;}
.card-desc{font-size:.9rem; font-weight:600; color:var(--dim); line-height:1.55;}
.card-go{
  margin-top:13px; display:inline-flex; align-items:center; gap:7px;
  font-weight:900; font-size:.9rem; color:var(--stage);
}
.lesson-card:hover .card-go{animation:nudge .5s infinite alternate;}
@keyframes nudge{from{transform:translateX(0);}to{transform:translateX(6px);}}

/* 特別卡：校本 AI 媒體入口（旋轉霓虹邊框） */
.lesson-card.special{border:none; background:transparent; backdrop-filter:none;}
.lesson-card.special::before{
  content:""; position:absolute; inset:-70%;
  background:conic-gradient(var(--cyan), var(--magenta), var(--purple), var(--cyan));
  animation:spin 5s linear infinite;
}
.lesson-card.special::after{
  content:""; position:absolute; inset:2px; border-radius:18px; background:var(--bg2);
}
@keyframes spin{to{transform:rotate(360deg);}}
.special-inner{position:relative; z-index:1; height:100%; display:flex; flex-direction:column;}
.special-tag{
  position:absolute; top:14px; right:14px; z-index:2; font-size:.68rem; font-weight:900; letter-spacing:2px;
  color:#04121a; background:linear-gradient(120deg, var(--cyan), var(--mint));
  padding:4px 11px; border-radius:999px; box-shadow:0 0 16px rgba(0,240,255,.5);
}
.special-note{
  margin-top:10px; font-size:.8rem; font-weight:700; color:var(--amber);
  border:1px dashed rgba(255,176,32,.5); border-radius:10px; padding:6px 10px;
}
.gateway-status{
  margin-top:9px; padding:7px 10px; border-radius:9px;
  font-size:.78rem; font-weight:900; line-height:1.35;
  background:rgba(255,255,255,.05); color:var(--dim);
}
.gateway-online .gateway-status{color:var(--mint); background:rgba(0,255,163,.1);}
.gateway-offline{cursor:not-allowed; filter:saturate(.62);}
.gateway-offline .gateway-status{color:#ff8896; background:rgba(255,77,109,.12);}
.gateway-offline .card-go{display:none;}
.gateway-offline:hover{transform:none; box-shadow:0 16px 40px rgba(0,0,0,.45);}
.no-result{
  text-align:center; font-weight:900; font-size:1.2rem; padding:56px 0; display:none; color:var(--dim);
}

/* ============ Footer ============ */
footer{text-align:center; padding:30px 18px 46px; font-weight:700; font-size:.88rem; color:var(--dim);}

/* ============ 老師模式 ============ */
#teacherPanel{display:none; max-width:1280px; margin:0 auto; padding:0 24px 60px;}
#teacherPanel.show{display:block; animation:fadeUp .4s;}
.t-card{
  background:var(--glass); border:1px solid var(--stroke); border-radius:20px;
  backdrop-filter:blur(14px); -webkit-backdrop-filter:blur(14px);
  box-shadow:0 16px 40px rgba(0,0,0,.45); padding:24px; margin-bottom:22px;
}
.t-card h2{
  margin-bottom:12px;
  background:linear-gradient(120deg,var(--cyan),var(--magenta));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.t-card p, .t-card li{font-size:.95rem; line-height:1.75; font-weight:600; color:var(--dim);}
.t-card li{margin-left:20px;}
.t-card b{color:var(--ink);}
.t-card code{
  background:rgba(0,240,255,.1); border:1px solid rgba(0,240,255,.35); color:var(--cyan);
  border-radius:6px; padding:1px 8px; font-weight:700;
}
.t-table{width:100%; border-collapse:collapse; margin-top:12px; font-size:.88rem;}
.t-table th,.t-table td{border:1px solid var(--stroke); padding:7px 10px; text-align:left;}
.t-table th{
  background:rgba(0,240,255,.08); color:var(--cyan);
  font-family:"Orbitron","Consolas",monospace; letter-spacing:1px; font-size:.76rem;
}
.t-table td.stage-cell{font-weight:900;}
.t-table a{font-weight:900; color:var(--cyan); text-decoration:none;}
.t-table a:hover{text-decoration:underline; text-shadow:0 0 10px currentColor;}
.t-table .t-link{color:var(--magenta);}

@media (max-width:720px){
  .stage-desc{margin-left:0;}
  .hero-orb{width:56px; height:56px; font-size:1.55rem;}
  #toolbar{position:static;}
}